(19)

(11)

EP 1 861 967 A2

(12)

(43) Date of publication: 05.12.2007 Bulletin 2007/49 (21) Application number: 06736304.4 (22) Date of filing: 27.02.2006

(51) International Patent Classification (IPC):  H04L 12/56(2006.01) (86) International application number: PCT/US2006/006962 (87) International publication number: WO 2006/101677 (28.09.2006 Gazette 2006/39)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK YU (30) Priority: 21.03.2005 US 664013 P 07.09.2005 US 220938 (71) Applicant: Cisco Technology, Inc. San Jose, CA 95134 (US)	(72) Inventors: SHEPHERD, Gregory Eugene, Oregon 97402 (US) FARINACCI, Dino San Jose, California 95120 (US) (74) Representative: Kazi, Ilya et al Mathys & Squire 120 Holborn London EC1N 2SQ London EC1N 2SQ (GB)